content: /*
   * Copyright 2016-present David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package hu.akarnokd.rxjava3.joins;
  
  import java.util.Map;
  import java.util.concurrent.atomic.AtomicReference;
  
  import hu.akarnokd.rxjava3.functions.Consumer6;
  import io.reactivex.rxjava3.core.Observer;
  import io.reactivex.rxjava3.functions.*;
  
  /**
   * Represents an execution plan for join patterns.
   * @param <T1> the first value type
   * @param <T2> the second value type
   * @param <T3> the third value type
   * @param <T4> the fourth value type
   * @param <T5> the fifth value type
   * @param <T6> the sixth value type
   * @param <R> the result type
   */
  final class Plan6<T1, T2, T3, T4, T5, T6, R> extends Plan<R> {
      protected final Pattern6<T1, T2, T3, T4, T5, T6> expression;
      protected final Function6<T1, T2, T3, T4, T5, T6, R> selector;
  
      Plan6(Pattern6<T1, T2, T3, T4, T5, T6> expression, Function6<T1, T2, T3, T4, T5, T6, R> selector) {
          this.expression = expression;
          this.selector = selector;
      }
  
      @Override
      public ActivePlan0 activate(Map<Object, JoinObserver> externalSubscriptions,
              final Observer<R> observer, final Consumer<ActivePlan0> deactivate) {
          Consumer<Throwable> onError = onErrorFrom(observer);
  
          final JoinObserver1<T1> jo1 = createObserver(externalSubscriptions, expression.o1(), onError);
          final JoinObserver1<T2> jo2 = createObserver(externalSubscriptions, expression.o2(), onError);
          final JoinObserver1<T3> jo3 = createObserver(externalSubscriptions, expression.o3(), onError);
          final JoinObserver1<T4> jo4 = createObserver(externalSubscriptions, expression.o4(), onError);
          final JoinObserver1<T5> jo5 = createObserver(externalSubscriptions, expression.o5(), onError);
          final JoinObserver1<T6> jo6 = createObserver(externalSubscriptions, expression.o6(), onError);
  
          final AtomicReference<ActivePlan0> self = new AtomicReference<>();
  
          ActivePlan0 activePlan = new ActivePlan6<>(
                  jo1, jo2, jo3, jo4, jo5, jo6,
                  new Consumer6<T1, T2, T3, T4, T5, T6>() {
                      @Override
                      public void accept(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6) {
                          R result;
                          try {
                              result = selector.apply(t1, t2, t3, t4, t5, t6);
                          } catch (Throwable t) {
                              observer.onError(t);
                              return;
                          }
                          observer.onNext(result);
                      }
                  },
                  new Action() {
                      @Override
                      public void run() throws Throwable {
                          ActivePlan0 ap = self.get();
                          jo1.removeActivePlan(ap);
                          jo2.removeActivePlan(ap);
                          jo3.removeActivePlan(ap);
                          jo4.removeActivePlan(ap);
                          jo5.removeActivePlan(ap);
                          jo6.removeActivePlan(ap);
                          deactivate.accept(ap);
                      }
                  });
  
          self.set(activePlan);
  
          jo1.addActivePlan(activePlan);
          jo2.addActivePlan(activePlan);
          jo3.addActivePlan(activePlan);
          jo4.addActivePlan(activePlan);
          jo5.addActivePlan(activePlan);
          jo6.addActivePlan(activePlan);
  
          return activePlan;
      }
  
  }
  